A leak at Japan's crippled Fukushima nuclear plant renews fears of radiation exposure.
The Tokyo Electric Power Company, which operates the plant where disaster struck with the 2011 tsunami and earthquake, said about 300 tonnes of highly contaminated water has leaked from a storage tank.
Offering an apology, TEPCO's general manager said the tank was still leaking and that a puddle nearby was emitting radiation.
"It can be said that we found a radiation level strong enough to give someone a five-year dose of radiation within one hour," he said.
Japan's Nuclear Regulation Authority classified the leak as a level 1 incident, the second lowest, on an international scale for radiological releases.
After months of denial, TEPCO admitted contaminated water from the plant is reaching the ocean, prompting the government to step up its involvement in cleanup efforts.

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